DTC P0643 is set when the voltage above 5.75V - maximum voltage of sensor power supply from ECM/PCM is detected. This code is due to the short to battery in sensor power circuit or the voltage problem inside of ECM/PCM.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Electricalal check | 1. Sensor power supply A circuit 2. ECM/PCM component |
Enable Conditions |
•
Battery 11V ~ 16V | |
Threshold Value |
•
Reference voltage(5V) is higher than 5.75V | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
2 driving cycles |
